Mounting cap means for dispenser



March 14, 1967 SEIICHI KITABAYASHI 3,30

MOUNTING CAP MEANS FOR DISPENSER Filed Sept. 27, 1965 INVENTOR K I TH B FIYHSH! /21 sEiicHi ATTORNEYS United States Patent Ofifice 3,308,982 Patented Mar. 14, 1967 3,308,982 MOUNTING CAP MEANS FOR DISPENSER Seiichi Kitabayashi, 22246 Nishisugamo, Toshima-ku, Tokyo, Japan Filed Sept. 27, 1965, Ser. No. 490,462 Claims priority, application Japan, Sept. 28, 1964, 39/ 54,552 1 Claim. (Cl. 215-73) The present invention is concerned with new mounting cap for aerosol dispensers containing a liquid under pressure with a discharge valve means and a push button for operating said valve means, said push button having an emission orifice.

Heretofore, mounting caps for aerosol dispensers, regardless of whether the dispensers are bottles or cans, were made of metal. Said mounting caps are of a cuplike form having a brim at the upper edge and the cuplike portion is fixed to the container by means of enlarging mechanically the side wall lower portion of said cup sidewardly for sealing the container mouth. Accordingly, known mounting caps cannot be fixed to cans or bottles without a special machine and good aerosol dispenser articles often do not result from the abovementioned mechanical work.

According to the present invention, however, not only the above-mentioned drawbacks of known mounting caps for aerosol dispenser are removed but the advantage from the mass-production of aerosol dispensers can be provided.

An object of the present invention is accordingly to provide an economical and particularly, a mass-production feasible mounting means for aerosol valves for aerosol containers containing a gas dissolving liquid generally under several atomic pressures.

The operation and further advantages of the present invention will be understood by reference to the following description taken in connection with the accompanyin g drawing, in which:

The sole figure of the drawing is a vertical sectional view of a mounting cap for aerosol dispensers according to the present invention equipped with discharge means and shown mounted on the upper portion of the aerosol container which is partially broken away:

in said figure, 1 is a container containing a solution under pressure of an expellent gas and having a mouth 3 and a brim 8 extending from said mouth, said brim having an annular cut and projecting outwardly and downwardly from said mouth with the end face of said out facing downward.

The mounting cap for aerosol dispensers according to the present invention comprises a thick disc 6 molded of synthetic resin being mounted on the brim 8 of the mouth 3 of the aerosol container, said disc 6 has an inner wall member 13 pendent from the bottom face thereof, the outer wall face of said inner wall member 13 engaging said container mouth portion 3 wall inner face, and said disc 6 having an outer wall member 14 being concentrical with said inner wall member 13 and being under inward stress tending to move said outer wall member inwardly. Said outer wall member 14 being provided on its inner face with an annular step 7 facing upward for engaging said end face of the container brim cut and said disc 6 further having a center post 4 molded integral therewith and rising upwards on the center thereof and being provided with an axial bore 15 opening in said disc bottom face and a through side orifice 16 for forming a discharge valve means.

11 is an annular rubber gasket positioned between disc 6 and brim 8, while 12 is an eductor tube in container 1 which extends through disc 6 and is in communication with bore 15 of post 4.

10 is an annular resilient gasket encased in push button 5 and the gasket 10 encircles post 4 and extends over said orifice 16 of the center post 4 for permitting said orifice 16 to be opened and closed to the inner cavity 17 of push button 5 upon the pushing and release of said push button. 18 is a discharge orifice in said push button.

As will be seen from the above example, the disc 6 which is the mounting means for the aerosol valve engages easily with brim 8 of the container mouth. However, once engaged, outer wall member 14 presses inwardly against the brim 8 due to its inward stress and the cut end of the brim 8 presses into the annular step 7 provided in the inner wall of said outer wall member 14. Due to the charging gas and solution in the container, the inner wall member 13 is pushed outwardly by the pressure of the gas. As a result of the co-operative actions of the outer and inner walls of the disc 6 the brim 8 of the container mouth is secured tightly seated.

The end face of the cut end of the container mouth 3 ordinarily is not plated and it is protected against oxidation or corrosion by the solution. This effect also ensures freedom from a change in the quality of the solution.

The center post 4 molded integral with said disc enables the structure of the discharge valve for the aerosol dispensers to be extremely simple.

Having thus described my invention what I claim is:

A container having a mouth and a brim extending from said mouth, said brim having an annular cut end projecting outwardly and downwardly from said mouth, the end face of said cut end facing downward, and a cap for mounting a valve means, said cap comprising a thick disk molded of synthetic resin, said disk having an inner wall member pendant from the bottom face thereof, the outer surface of said inner wall member engaging the inner surface of said container mouth, said disk having an outer wall member concentric with said inner wall member, said outer wall member being under stress tending to move said outer wall member inwardly, said outer wall member having an annular step facing upward and engaging said end face of said cut end, said disc having a center post integrally molded therewith and rising upward on the center thereof and being provided with an axial bore opening in said disc bottom face and a through side orifice for forming a discharge valve means. 

